<template>
  <el-dialog v-model="dialogVisible" :appendToBody="true" title="选择空间" width="70%">
    <ContentWrap>
      <el-form ref="queryFormRef" :inline="true" :model="queryParams" class="-mb-15px" label-width="68px">
        <el-form-item label="分组名称" prop="groupName">
          <el-input v-model="queryParams.groupName" class="!w-240px" clearable placeholder="请输入空间名称" @keyup.enter="handleQuery" />
        </el-form-item>
        <el-form-item label="空间名称" prop="teroomName">
          <el-input v-model="queryParams.teroomName" class="!w-240px" clearable placeholder="请输入空间名称" @keyup.enter="handleQuery" />
        </el-form-item>
        <el-form-item>
          <el-button @click="handleQuery">
            <Icon class="mr-5px" icon="ep:search" />
            搜索
          </el-button>
          <el-button @click="resetQuery">
            <Icon class="mr-5px" icon="ep:refresh" />
            重置
          </el-button>
        </el-form-item>
      </el-form>
      <el-table v-loading="loading" :data="list" show-overflow-tooltip>
        <!-- 1. 多选模式（不能使用type="selection"，Element会忽略Header插槽） -->
        <el-table-column width="55" v-if="multiple">
          <template #header>
            <el-checkbox v-model="isCheckAll" :indeterminate="isIndeterminate" @change="handleCheckAll" />
          </template>
          <template #default="{ row }">
            <el-checkbox v-model="checkedStatus[row.id]" @change="(checked: boolean) => handleCheckOne(checked, row, true)" />
          </template>
        </el-table-column>
        <!-- 2. 单选模式 -->
        <el-table-column label="#" width="55" v-else>
          <template #default="{ row }">
            <el-radio :value="row.id" v-model="selectedRoomId" @change="handleSingleSelected(row)">
              <!-- 空格不能省略，是为了让单选框不显示label，如果不指定label不会有选中的效果 -->
              &nbsp;
            </el-radio>
          </template>
        </el-table-column>
        <el-table-column key="id" align="center" label="空间编号" prop="id" min-width="60" />
        <el-table-column label="空间图" align="center" min-width="80">
          <template #default="{ row }">
            <el-image :src="row.teroomImgurl" class="h-30px w-30px" :preview-src-list="[row.teroomImgurl]" preview-teleported />
          </template>
        </el-table-column>
        <el-table-column label="分组名称" align="center" min-width="100" prop="groupName" />
        <el-table-column label="名称" align="center" min-width="100" prop="teroomName" />
        <el-table-column label="状态" align="center" prop="status">
          <template #default="scope">
            <dict-tag :options="room_status" :value="scope.row.status" />
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页 -->
      <Pagination v-model:limit="queryParams.pageSize" v-model:page="queryParams.pageNum" :total="total" @pagination="getList" />
    </ContentWrap>
    <template #footer v-if="multiple">
      <el-button type="primary" @click="handleEmitChange">确 定</el-button>
      <el-button @click="dialogVisible = false">取 消</el-button>
    </template>
  </el-dialog>
</template>

<script lang="ts" setup>
import { listRoomDetails, querygroupDetails } from '@/api/tearoom/roomDetails/index';
import { RoomDetailsForm, RoomDetailsVO, RoomDetailsQuery } from '@/api/tearoom/roomDetails/types';
import { propTypes } from '@/utils/propTypes';
import { CHANGE_EVENT } from 'element-plus';

type Room = Required<RoomDetailsVO>;

/**
 * 空间表格选择对话框
 * 1. 单选模式：
 *    1.1 点击表格左侧的单选框时，结束选择，并关闭对话框
 *    1.2 再次打开时，保持选中状态
 * 2. 多选模式：
 *    2.1 点击表格左侧的多选框时，记录选中的空间
 *    2.2 切换分页时，保持空间的选中的状态
 *    2.3 点击右下角的确定按钮时，结束选择，关闭对话框
 *    2.4 再次打开时，保持选中状态
 */
defineOptions({ name: 'RoomTableSelect' });

defineProps({
  // 多选模式
  multiple: propTypes.bool.def(false)
});
const { proxy } = getCurrentInstance() as ComponentInternalInstance;
const { room_status } = toRefs<any>(proxy?.useDict('room_status'));
const initFormData: RoomDetailsForm = {
  id: undefined,
  teroomPepnum: undefined,
  teroomName: undefined,
  teroomPhoto: undefined,
  teroomHprice: undefined,
  teroomNum: undefined,
  teroomImgurl: undefined,
  groupId: undefined,
  groupName: undefined,
  contentIntro: undefined,
  status: undefined
};
const data = reactive<PageData<RoomDetailsForm, RoomDetailsQuery>>({
  form: { ...initFormData },
  queryParams: {
    pageNum: 1,
    pageSize: 10,
    teroomPepnum: undefined,
    teroomName: undefined,
    teroomPhoto: undefined,
    teroomHprice: undefined,
    teroomNum: undefined,
    teroomImgurl: undefined,
    groupId: undefined,
    groupName: undefined,
    contentIntro: undefined,
    status: undefined
  },
  rules: {}
});

const queryFormRef = ref<ElFormInstance>();
// 列表的总页数
const total = ref(0);
// 列表的数据
const list = ref<Room[]>([]);
// 列表的加载中
const loading = ref(false);
// 弹窗的是否展示
const dialogVisible = ref(false);
// 查询参数
const {queryParams} = toRefs(data);

/** 打开弹窗 */
const open = (roomList?: Room[]) => {
  // 重置
  checkedRooms.value = [];
  checkedStatus.value = {};
  isCheckAll.value = false;
  isIndeterminate.value = false;

  // 处理已选中
  if (roomList && roomList.length > 0) {
    checkedRooms.value = [...roomList];
    checkedStatus.value = Object.fromEntries(roomList.map((room) => [room.id, true]));
  }

  dialogVisible.value = true;
  resetQuery();
};
// 提供 open 方法，用于打开弹窗
defineExpose({ open });

/** 查询列表 */
const getList = async () => {
  loading.value = true;
  try {
    const data = await listRoomDetails(queryParams.value);
    list.value = data.rows;
    total.value = data.total;
    // checkbox绑定undefined会有问题，需要给一个bool值
    list.value.forEach((room) => (checkedStatus.value[room.id] = checkedStatus.value[room.id] || false));
    // 计算全选框状态
    calculateIsCheckAll();
  } finally {
    loading.value = false;
  }
};

/** 搜索按钮操作 */
const handleQuery = () => {
  queryParams.value.pageNum = 1;
  getList();
};

/** 重置按钮操作 */
/** 重置按钮操作 */
const resetQuery = () => {
  queryFormRef.value?.resetFields();
  getList();
};

// 是否全选
const isCheckAll = ref(false);
// 全选框是否处于中间状态：不是全部选中 && 任意一个选中
const isIndeterminate = ref(false);
// 选中的空间
const checkedRooms = ref<Room[]>([]);
// 选中状态：key为空间ID，value为是否选中
const checkedStatus = ref<Record<string, boolean>>({});

// 选中的空间 roomId
const selectedRoomId = ref();
/** 单选中时触发 */
const handleSingleSelected = (room: Room) => {
  emits(CHANGE_EVENT, room);
  // 关闭弹窗
  dialogVisible.value = false;
  // 记住上次选择的ID
  selectedRoomId.value = room.id;
};

/** 多选完成 */
const handleEmitChange = () => {
  // 关闭弹窗
  dialogVisible.value = false;
  emits(CHANGE_EVENT, [...checkedRooms.value]);
};

/** 确认选择时的触发事件 */
const emits = defineEmits<{
  change: [room: Room | Room[] | any];
}>();

/** 全选/全不选 */
const handleCheckAll = (checked: boolean) => {
  isCheckAll.value = checked;
  isIndeterminate.value = false;

  list.value.forEach((room) => handleCheckOne(checked, room, false));
};

/**
 * 选中一行
 * @param checked 是否选中
 * @param room 空间
 * @param isCalcCheckAll 是否计算全选
 */
const handleCheckOne = (checked: boolean, room: Room, isCalcCheckAll: boolean) => {
  if (checked) {
    checkedRooms.value.push(room);
    checkedStatus.value[room.id] = true;
  } else {
    const index = findCheckedIndex(room);
    if (index > -1) {
      checkedRooms.value.splice(index, 1);
      checkedStatus.value[room.id] = false;
      isCheckAll.value = false;
    }
  }

  // 计算全选框状态
  if (isCalcCheckAll) {
    calculateIsCheckAll();
  }
};

// 查找空间在已选中空间列表中的索引
const findCheckedIndex = (room: Room) => checkedRooms.value.findIndex((item) => item.id === room.id);

// 计算全选框状态
const calculateIsCheckAll = () => {
  isCheckAll.value = list.value.every((room) => checkedStatus.value[room.id]);
  // 计算中间状态：不是全部选中 && 任意一个选中
  isIndeterminate.value = !isCheckAll.value && list.value.some((room) => checkedStatus.value[room.id]);
};

// 分类列表
const categoryList = ref();
// 分类树
const categoryTreeList = ref();
/** 初始化 **/
onMounted(async () => {
  await getList();
  // 获得分类树
  //categoryList.value = await querygroupDetails();
});
</script>
